V.Cavaliere (Univ. Siena),"Measurement of WW/WZ cross section in lepton-neutrino +jets final state at CDF"

Tuesday 14 Dec 2010, 15:00 → 17:00 Europe/Rome

131 (INFN edificio C)

"The observation of WW + WZ production in the channel with an identified lepton, neutrino and jets is presented using 4.3 fb^{-1} of integrated luminosity collected with the CDF II detector in pp ̄ collsions at √s = 1.96 TeV. Di-bosons are of great interest because they provide unique opportunities to test the Standard Model at the TeV scale. Moreover, the process WW+WZ -> l nu + jj shares the same event topology of WH -> l nu + b b-bar, the golden channel for low mass Higgs searches at CDF. As a consequence, establishing Di-boson production with jets in the final state represents a crucial milestone for the development and understanding of techniques used in Higgs boson searches at the Tevatron. This measurement uses a fit to the dijet mass system to disentangle the signal from the large background. The significance of the result is found to be 5.24 σ and the cross section is measured to be 18.1±3.3(stat.)±2.5(syst.) pb, in good agreement with Standard Model prediction."

Slides seminar.pdf